was in Chicago for the B96 Summer Bash – but the singer made time for the club scene. Jonas partied with DJ Syphe at club The Underground, where he debuted his new dance song,
"See No More," to a packed house. Days before trekking to the Windy City, Jonas stepped out for a cheeseburger dinner at West Hollywood's Chateau Marmont
. He was in good spirits as he drank a soda and enjoyed his meal with two guy friends, according to an onlooker.